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Desired amount of nitrogen (N): 45 kg Desired amount of phosphorus pentoxide (P₂ O₅ ): 115 kg To calculate the quantity of DAP required for nitrogen: Quantity of DAP for nitrogen = Desired amount of nitrogen / Nitrogen content in DAP Nitrogen content in DAP = 18% Quantity of DAP for nitrogen = 45 kg / 0.18 = 250 kg To calculate the quantity of DAP required for phosphorus pentoxide: Quantity of DAP for phosphorus pentoxide = Desired amount of phosphorus pentoxide / Phosphorus pentoxide content in DAP Phosphorus pentoxide content in DAP = 46% Quantity of DAP for phosphorus pentoxide = 115 kg / 0.46 = 250 kg Since both calculations yield the same quantity, the required quantity of DAP is (a) 250 kg. Therefore, 250 kg of DAP is required for the given application of 45 kg N and 115 kg P₂ O₅ .
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